Thanks for the explanation :)

I also experienced this on campaign level 10 (The Kenos). I don't know what exactly triggered it, but 'Rally all minions' flag was active and I used possession on one of the minions around the flag. When I left the possession mode (after few minutes), all units were standing still. They resumed their normal activity after relocating the rally flag few times.

I tried to reproduce it again and made few more observations. Tavern does not always break completely - it seems it is related to cannon's meat filling level which may not be saved properly:

• Sometimes after load meat filling level is different as it was when saved
• Sometimes it resets to 10% when next micropiglet is delivered (50% before save, 50% after reload, 10% after delivery)
• Workers are not able to fill the cannon to 100% after reload
• If it was 100% full before save, cannon does not produce any more meals
• It can be fixed by manually restocking the cannon